Lyrically, the album focuses on speaking out against prejudices, exuding self-confidence, embracing one's own darker self, self-healing, and the feelings after breakups.

[1] The album was released on the same day as the lead single "Tomboy", which reached number one on both the Circle Digital Chart and K-pop Hot 100.

In January 2021, the group released their fourth extended play I Burn, which detailed the various emotions experienced during the process of finding happiness after separation.

In an interview with E-Daily, Miyeon revealed that (G)I-dle might be promoting as a group "sooner than fans expect" and that they "will show you lots of new and cool sides of ourselves this year".

[9] On February 28, the track listing was revealed, with "Tomboy" announced as the lead single, followed by a lyric poster on March 1.

[21] The "bombastic" and "proud" closing track "My Bag" is a climactic song where all members show off their rapping prowess against a hip-hop instrumental.

Tanu further elaborated: "I Never Die is less of a proclamation and more of an assurance for (G)I-dle themselves – peel away the bravado, gumption and even the wondrous layers, and you'll find a simple promise: no matter what, they will always make it through, and they will always be here.

[23] Genius's Maddison Murray wrote, "I Never Die is (G)I-dle at their strongest and most incredible to date, exploring a range of concepts while still staying cohesive and true to the group’s vision.

Minnie, Miyeon, Soyeon, Shuhua, and Yuqi get to show off their impeccable talents in ways unlike Neverland [the group's fandom] has ever seen before, and the result is a beautiful album that fans will cherish for years to come.

Heading into the fifth year of their career, it’s more clear than ever that (G)I-dle are industry frontrunners who will continue to push themselves into new territory with experimental sounds, introspective lyrics, and performances like the world has never seen.

And while the group begins to challenge stereotypes in the lead single "Tomboy"—where they refuse to become a "blond barbie doll" to meet societal standards—(G)I-dle builds upon the rebellious energy in the tracks that follow.

[28] The album comes with a CD, photobook, lyric paper, sticker, secret pocket, photo evidence 1 and 2, photocard, and mini poster.

[29] On February 24, 2022, Cube Entertainment announced on their social media accounts that the group would be releasing their first studio album titled I Never Die on March 14.

On March 8, 2022, (G)I-dle released a one-minute-long video for the track "My Bag", where they are accompanied by a team of backup dancers in the middle of an empty road, racing in flashy white sports cars.

[36] On May of the same year, Cube confirmed that the group would embark on their 3rd world tour Just Me ( )I-dle In support of the album, with the first leg kicking off on June 18, at the Olympic Hall in Seoul, South Korea.